Polymer additives and colourants manufacturer Milliken & Company has launched DeltaFlow Viscosity Modifiers aimed at polypropylene (PP) recyclers.

The company says that DeltaFlow is a solid concentrate that can be used to increase the melt flow rate of recycled PP (rPP) for extrusion and injection moulding processes. DeltaFlow-optimised resins will reportedly allow for lower processing temperatures, which can help convertors to reduce cycle times, boost productivity, and improve processability.

According to Milliken, DeltaFlow enables rPP to replace virgin resin in some end-use applications. This could encourage brands to use more rPP in products.

Milliken will offer DeltaFLow in free-flowing pellets, which it claims makes the product easy to feed, safe to handle, and dust free. Currently produced in Germany, DeltaFlow will be available in concentrations of 2, 5 and 10% to meet different applications and equipment requirements.

Tugce Asici-van Houselt, sales manager for plastic additives EMEA at Milliken, says: “Milliken & Company remains committed to supporting the plastics recycling industry with advanced polymer additives that allow for the increased use of recycled content by improving the properties of the recycled PP resin itself.

“DeltaFlow Viscosity Modifiers are just the latest example of this effort, which in turn, contributes to the industry’s ongoing push to promote sustainability.”

Milliken has previously partnered with PureCycle Technologies – with which it has an exclusive supply relationship – on plans to open a plat to restore used PP plastic to virgin-like quality using a “revolutionary” chemical recycling method. Earlier this year, Milliken’s research and development team helped The Ferrero Group to develop a recyclable box for its Ferrero Rocher chocolate range.